I am disappointed by Y Combinator's Request for Startups Summer 2025. As the most influential startup accelerator in the world, Y Combinator (YC) has the power-and the responsibility-to shape the direction of early-stage innovation. Their choices send a clear signal about what kinds of problems are worth solving, and, by extension, what kind of future we are building. Yet, their latest RFS reads like a manifesto for AI maximalism, with barely a nod to the urgent challenges of climate, nature, and sustainability.
A Singular Focus on AI, to the Exclusion of Climate and Nature
The Summer 2025 RFS is almost entirely dominated by artificial intelligence. Out of fourteen categories, thirteen are explicitly AI-focused, ranging from full-stack AI companies and voice assistants to AI for healthcare, education, and even financial advice. The language is clear: YC wants founders to build the next generation of AI-driven businesses, not just tools, but entire companies powered by AI that can disrupt slow-moving incumbents.
This is not just a trend-it's a tidal wave. The RFS is a goldmine for anyone building in AI, but for those working on climate tech, nature tech, or broader sustainability, there is a deafening silence. Even in the few places where science or engineering are mentioned, the emphasis is on AI as an enabler, not on solving environmental crises directly.
Token Mentions of Climate Tech-But No Real Priority
To be fair, climate tech did make the list in a previous YC call for startups, and there was a brief mention in a recent update. But in the Summer 2025 RFS, climate tech is either absent or relegated to a minor, almost token role. The focus is overwhelmingly on AI, with climate and sustainability issues at best an afterthought, if they are present at all.
Contrast this with the scale of the climate emergency. The world is facing record heat, biodiversity loss, and ecosystem collapse. The startup ecosystem desperately needs more founders tackling these existential problems. If YC truly believes in funding companies that matter, why is climate tech not front and center? Why isn't there a call for startups reimagining agriculture, restoring nature, decarbonizing industry, or building resilient cities?
Market-Driven, Not Vision-Driven
YC's approach seems to be following the market, not leading it. AI is hot, and there is no denying its transformative potential. But being a market leader means more than chasing the latest technological wave. It means articulating a vision for a desirable future and encouraging founders to build towards it. The current RFS feels reactive, not proactive-an echo of investor hype, rather than a call to arms for planetary-scale innovation.
Responsibility and Missed Opportunity
As the authority in early-stage tech, YC's choices matter. When they prioritize AI to the near-exclusion of sustainability or climate, they send a message to thousands of ambitious founders: "This is what matters. This is what gets funded." The result is a self-fulfilling prophecy-more AI startups, fewer climate solutions, and a tech ecosystem increasingly detached from the physical realities of our planet.
YC has the platform to do better. They could champion climate tech, nature tech, and sustainability not as niche interests, but as central pillars of the next wave of innovation. They could demand that founders tackle the hardest, most meaningful problems of our time. Instead, the Summer 2025 RFS feels like a missed opportunity-a document that will be remembered for what it left out, not what it inspired.
Conclusion
I want to see Y Combinator use its influence to shape a future that is not just more automated, but more sustainable, equitable, and resilient. The Summer 2025 Request for Startups falls short of that vision. The world needs more than AI agents-it needs bold, systemic solutions to the climate and nature crises. YC has the authority to lead. It's time they took that responsibility seriously.